How to debug js project with breakpoint in vscode

{ "name": "使用本机 Chrome 调试", "type": "chrome", "request": "launch", "file": "${workspaceRoot}/index.html", // "url": "http://mysite.com/index.html", //使用外部服务器时,请注释掉 file, 改用 url, 并将 useBuildInServer 设置为 false "http://mysite.com/index.html "runtimeExecutable": "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe", // 改成您的 Chrome 安装路径 "sourceMaps": true, "webRoot": "${workspaceRoot}", // "preLaunchTask":"build", "userDataDir":"${tmpdir}", "port":5433 }